US4991184A - Data communication system having a speed setting variable with transmission quality factors - Google Patents
Data communication system having a speed setting variable with transmission quality factors Download PDFInfo
- Publication number
- US4991184A US4991184A US07/452,071 US45207189A US4991184A US 4991184 A US4991184 A US 4991184A US 45207189 A US45207189 A US 45207189A US 4991184 A US4991184 A US 4991184A
- Authority
- US
- United States
- Prior art keywords
- transmission medium
- speed setting
- signals
- channel
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0025—Transmission of mode-switching indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
- H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
Abstract
Description
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63316468A JPH0626343B2 (en) | 1988-12-16 | 1988-12-16 | Modulator / demodulator data transmission rate automatic switching system |
JP63-316468 | 1988-12-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4991184A true US4991184A (en) | 1991-02-05 |
Family
ID=18077433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/452,071 Expired - Fee Related US4991184A (en) | 1988-12-16 | 1989-12-18 | Data communication system having a speed setting variable with transmission quality factors |
Country Status (2)
Country | Link |
---|---|
US (1) | US4991184A (en) |
JP (1) | JPH0626343B2 (en) |
Cited By (71)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991014313A1 (en) * | 1990-03-09 | 1991-09-19 | Scientific-Atlanta, Inc. | Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed rf measurement receiver |
US5155744A (en) * | 1989-02-01 | 1992-10-13 | Siemens Aktiengesellschaft | Combiner for radio receiving system which uses a viterbi demodulator |
US5359607A (en) * | 1991-11-13 | 1994-10-25 | Motorola, Inc. | Adaptive intermodulation control |
EP0630134A2 (en) * | 1993-06-14 | 1994-12-21 | AT&T Corp. | Simultaneous analog and digital communication with an enhanced data rate during near silence |
EP0630128A2 (en) * | 1993-06-14 | 1994-12-21 | AT&T Corp. | Autorate method for simultaneous transmission of voice and data |
US5386589A (en) * | 1991-12-26 | 1995-01-31 | Nec Corporation | Transmission power control system capable of keeping signal quality constant in mobile communication network |
WO1995008888A1 (en) * | 1993-09-24 | 1995-03-30 | Qualcomm Incorporated | Multirate serial viterbi decoder for code division multiple access system applications |
EP0648032A1 (en) * | 1993-10-11 | 1995-04-12 | Nokia Mobile Phones Ltd. | A signal quality detecting circuit and method for receivers in the GSM system |
EP0651531A2 (en) * | 1993-10-29 | 1995-05-03 | AT&T Corp. | Communication technique employing variable information transmission rate function of quality |
FR2713855A1 (en) * | 1993-12-15 | 1995-06-16 | Alcatel Telspace | A method of detecting carrier recovery stall and determining the EB / NO ratio of a digital transmission link and device implementing this method. |
US5450616A (en) * | 1992-07-13 | 1995-09-12 | Sun Microsystems, Inc. | Method and apparatus for power control in a wireless lan |
US5465399A (en) * | 1992-08-19 | 1995-11-07 | The Boeing Company | Apparatus and method for controlling transmitted power in a radio network |
EP0702863A4 (en) * | 1994-02-17 | 1996-02-08 | Motorola Inc | Method and apparatus for controlling encoding rate in a communication system |
EP0701752A1 (en) * | 1993-05-28 | 1996-03-20 | Motorola, Inc. | A method and apparatus for determining signal usability |
US5524122A (en) * | 1993-09-13 | 1996-06-04 | U.S. Philips Corporation | System and method for adapting the transmission rate to the line quality and modem suitable for such a system |
EP0715481A1 (en) * | 1994-06-20 | 1996-06-05 | Sony Corporation | Communication system, base station, mobile station, and radio communication system |
US5541955A (en) * | 1992-11-06 | 1996-07-30 | Pericle Communications Company | Adaptive data rate modem |
US5546411A (en) * | 1995-02-28 | 1996-08-13 | Motorola, Inc. | Method and apparatus for adaptively selecting a communication strategy in a selective call radio communication system |
EP0749092A2 (en) * | 1995-06-13 | 1996-12-18 | Ncr International Inc. | An electronic price label (EPL) system |
US5603088A (en) * | 1995-02-28 | 1997-02-11 | Motorola, Inc. | Method and apparatus for determining a quality level of an analog signal in a radio communication system |
US5608490A (en) * | 1994-06-20 | 1997-03-04 | Nikon Corporation | Apparatus for and a method of communicating between a camera and external equipment |
US5619532A (en) * | 1994-09-05 | 1997-04-08 | Fujitsu Limited | Digital communication system |
GB2306866A (en) * | 1995-10-26 | 1997-05-07 | Bosch Gmbh Robert | Method of obtaining information about the residual errors in a transmitter channel-decoded digital signal |
US5638384A (en) * | 1993-01-07 | 1997-06-10 | Kabushiki Kaisha Toshiba | Data communication system |
US5664095A (en) * | 1993-12-08 | 1997-09-02 | Intel Corporation | Dynamic scaling of CPU cycle consumption in a computer system |
US5726638A (en) * | 1994-12-12 | 1998-03-10 | Nippondenso Co., Ltd. | Method and device for serial communication |
US5790781A (en) * | 1993-12-08 | 1998-08-04 | Intel Corporation | Dynamic scaling of CPU cycle consumption in an I/O subsystem of a computer system |
US5831545A (en) * | 1995-08-25 | 1998-11-03 | Motorola, Inc. | Method and apparatus for adjusting a communication strategy in a radio communication system using location |
WO1998049800A1 (en) * | 1997-04-30 | 1998-11-05 | Telefonaktiebolaget Lm Ericsson | Estimation of radio channel bit error rate in a digital radio telecommunications network |
US5914959A (en) * | 1996-10-31 | 1999-06-22 | Glenayre Electronics, Inc. | Digital communications system having an automatically selectable transmission rate |
US5940439A (en) * | 1997-02-26 | 1999-08-17 | Motorola Inc. | Method and apparatus for adaptive rate communication system |
FR2775547A1 (en) * | 1998-03-02 | 1999-09-03 | Nec Corp | Digital radiocommunications system |
US5956376A (en) * | 1993-11-29 | 1999-09-21 | Murata Mfg. Co., Ltd. | Apparatus for varying a sampling rate in a digital demodulator |
US5978428A (en) * | 1995-08-23 | 1999-11-02 | Oki Electric Industry Co., Ltd. | Apparatus and method for estimating a variable data rate |
EP0969624A2 (en) * | 1998-07-01 | 2000-01-05 | NOKIA TECHNOLOGY GmbH | Method for monitoring the quality of a transmission channel and a digital receiver |
US6104512A (en) * | 1998-01-23 | 2000-08-15 | Motorola, Inc. | Method for adjusting the power level of an infrared signal |
US6148423A (en) * | 1992-07-22 | 2000-11-14 | Alcatel Cit | Signal transmission performance optimization device in a system for transmitting digital data, especially on an optical link |
EP1067729A2 (en) * | 1999-07-09 | 2001-01-10 | Nec Corporation | Data transfer control system for mobile packet communications |
US6246335B1 (en) * | 1993-12-28 | 2001-06-12 | Nec Corporation | Portable information equipment system and control method thereof |
US6252898B1 (en) * | 1995-07-19 | 2001-06-26 | Hitachi Denshi Kabushiki Kaisha | Spread spectrum communication method and system wherein data rate of data to be transmitted is changed in accordance with transmission quality |
US20010048485A1 (en) * | 2000-05-31 | 2001-12-06 | Sony Corporation | Signal processor and signal processing method |
EP1171979A1 (en) * | 2000-02-14 | 2002-01-16 | Motorola, Inc. | Data packets retransmission in a communication system |
EP1173989A1 (en) * | 2000-02-14 | 2002-01-23 | Motorola, Inc. | Method of dynamic rate switching via medium access channel layer signaling |
WO2002035906A2 (en) * | 2000-11-01 | 2002-05-10 | Actelis Networks Ltd. | High speed access system over copper cable plant |
WO2002100033A1 (en) * | 2001-06-04 | 2002-12-12 | Qualcomm Incorporated | Method and apparatus for estimating the signal to interference ratio of a wireless channel |
US20030016694A1 (en) * | 2001-07-20 | 2003-01-23 | Adtran, Inc. | System for providing extended range ADSL service with auxiliary pots channel over single-line digital subscriber link |
US6539081B2 (en) | 2001-07-20 | 2003-03-25 | Adtran Inc. | Method of establishing signaling rate for single-line digital subscriber link providing extended range ADSL service with auxiliary pots channel |
WO2003032559A1 (en) * | 2001-10-09 | 2003-04-17 | Ubinetics Limited | Blind transport format detection using soft decision monitoring |
WO2003041297A1 (en) * | 2001-11-08 | 2003-05-15 | Telefonaktiebolaget Lm Ericsson Ab (Publ) | Method for link adaptation and transmit power control |
US6570911B1 (en) * | 1997-06-27 | 2003-05-27 | Intel Corporation | Method and apparatus for controlling modem data pump parameters based on processor loading |
US6625226B1 (en) * | 1999-12-03 | 2003-09-23 | Allen Gersho | Variable bit rate coder, and associated method, for a communication station operable in a communication system |
US20040008644A1 (en) * | 1999-10-07 | 2004-01-15 | Jack Holtzman | Method and apparatus for predicting favored supplemental channel transmission slots using transmission power measurements of a fundamental channel |
US20040053578A1 (en) * | 1996-08-20 | 2004-03-18 | Grabon Robert J. | Wireless communications system having reduced noise mode operation capability |
US6775550B2 (en) | 2001-07-20 | 2004-08-10 | Adtran, Inc. | Method of inducing ADSL communication device to transmit at downstream signaling rate optimized for extended range ADSL service with auxiliary pots channel over SDSL link |
GB2399718A (en) * | 2003-03-18 | 2004-09-22 | Agilent Technologies Inc | Rate adaptive optical communication system |
WO2004084479A1 (en) * | 2003-03-17 | 2004-09-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Dual loop signal quality based link adaptation |
US20050220180A1 (en) * | 1999-02-23 | 2005-10-06 | Tuvia Barlev | High speed access system over copper cable plant |
DE10035389B4 (en) * | 2000-07-20 | 2005-11-10 | Siemens Ag | Method for data transmission in the access area |
US20050254465A1 (en) * | 2000-10-25 | 2005-11-17 | Lundby Stein A | Method and apparatus for determining a data rate in a high rate packet data wireless communications system |
US20060018258A1 (en) * | 2004-07-23 | 2006-01-26 | Qualcomm Incorporated | Method of optimizing portions of a frame |
US20060168310A1 (en) * | 2004-12-03 | 2006-07-27 | Fujitsu Limited | Data communication system capable of adjusting transmission speeds |
US20070019567A1 (en) * | 1997-11-03 | 2007-01-25 | Roberto Padovani | Method and apparatus for high rate packet data transmission |
US20080008136A1 (en) * | 1997-11-03 | 2008-01-10 | Qualcomm Incorporated | Pilot reference transmission for a wireless communication system |
US20080115146A1 (en) * | 2006-11-09 | 2008-05-15 | Advanced Medical Optics, Inc. | Serial communications protocol for safety critical systems |
US20080114852A1 (en) * | 2006-11-09 | 2008-05-15 | Advanced Medical Optics, Inc. | Serial communications protocol |
US7400688B2 (en) * | 2001-08-03 | 2008-07-15 | Lucent Technologies Inc. | Path metric normalization |
US20110069629A1 (en) * | 2009-09-22 | 2011-03-24 | Qualcomm Incorporated | Physical layer metrics to support adaptive station-dependent channel state information feedback rate in multi-user communication systems |
US8064409B1 (en) | 1999-08-25 | 2011-11-22 | Qualcomm Incorporated | Method and apparatus using a multi-carrier forward link in a wireless communication system |
US8422380B2 (en) | 2003-03-26 | 2013-04-16 | Sharp Laboratories Of America, Inc. | Dynamically reconfigurable wired network |
US8494063B1 (en) * | 2001-09-25 | 2013-07-23 | Netgear, Inc. | System and method for stacking receiver channels for increased system through-put in an RF data transmission system |
US9426821B2 (en) | 2000-10-25 | 2016-08-23 | Qualcomm Incorporated | Method and apparatus for high rate packet data and low delay data transmissions |
Citations (5)
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US3534264A (en) * | 1966-04-15 | 1970-10-13 | Ibm | Adaptive digital communication system |
US3536840A (en) * | 1969-04-25 | 1970-10-27 | Computer Modem Corp | Digital data transmission system with a variable transmission rate |
US4710925A (en) * | 1983-12-12 | 1987-12-01 | Canon Kabushiki Kaisha | Data communication system |
US4736388A (en) * | 1986-06-23 | 1988-04-05 | Nec Corporation | Automatic fall back and restore system for data communication |
US4756007A (en) * | 1984-03-08 | 1988-07-05 | Codex Corporation | Adaptive communication rate modem |
-
1988
- 1988-12-16 JP JP63316468A patent/JPH0626343B2/en not_active Expired - Lifetime
-
1989
- 1989-12-18 US US07/452,071 patent/US4991184A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US3534264A (en) * | 1966-04-15 | 1970-10-13 | Ibm | Adaptive digital communication system |
US3536840A (en) * | 1969-04-25 | 1970-10-27 | Computer Modem Corp | Digital data transmission system with a variable transmission rate |
US4710925A (en) * | 1983-12-12 | 1987-12-01 | Canon Kabushiki Kaisha | Data communication system |
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Cited By (141)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5155744A (en) * | 1989-02-01 | 1992-10-13 | Siemens Aktiengesellschaft | Combiner for radio receiving system which uses a viterbi demodulator |
US5125008A (en) * | 1990-03-09 | 1992-06-23 | Scientific-Atlanta, Inc. | Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed rf measurement receiver |
WO1991014313A1 (en) * | 1990-03-09 | 1991-09-19 | Scientific-Atlanta, Inc. | Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed rf measurement receiver |
US5359607A (en) * | 1991-11-13 | 1994-10-25 | Motorola, Inc. | Adaptive intermodulation control |
US5386589A (en) * | 1991-12-26 | 1995-01-31 | Nec Corporation | Transmission power control system capable of keeping signal quality constant in mobile communication network |
US5450616A (en) * | 1992-07-13 | 1995-09-12 | Sun Microsystems, Inc. | Method and apparatus for power control in a wireless lan |
US6148423A (en) * | 1992-07-22 | 2000-11-14 | Alcatel Cit | Signal transmission performance optimization device in a system for transmitting digital data, especially on an optical link |
US5465399A (en) * | 1992-08-19 | 1995-11-07 | The Boeing Company | Apparatus and method for controlling transmitted power in a radio network |
US5541955A (en) * | 1992-11-06 | 1996-07-30 | Pericle Communications Company | Adaptive data rate modem |
US5638384A (en) * | 1993-01-07 | 1997-06-10 | Kabushiki Kaisha Toshiba | Data communication system |
EP0701752A4 (en) * | 1993-05-28 | 1997-10-01 | Motorola Inc | A method and apparatus for determining signal usability |
EP0701752A1 (en) * | 1993-05-28 | 1996-03-20 | Motorola, Inc. | A method and apparatus for determining signal usability |
US5671250A (en) * | 1993-06-14 | 1997-09-23 | Paradyne Corporation | Autorate method for simultaneous transmission of voice data |
EP0630128A2 (en) * | 1993-06-14 | 1994-12-21 | AT&T Corp. | Autorate method for simultaneous transmission of voice and data |
EP0630134A2 (en) * | 1993-06-14 | 1994-12-21 | AT&T Corp. | Simultaneous analog and digital communication with an enhanced data rate during near silence |
EP0630134A3 (en) * | 1993-06-14 | 1997-05-02 | At & T Corp | Simultaneous analog and digital communication with an enhanced data rate during near silence. |
EP0630128A3 (en) * | 1993-06-14 | 1997-05-02 | At & T Corp | Autorate method for simultaneous transmission of voice and data. |
US5524122A (en) * | 1993-09-13 | 1996-06-04 | U.S. Philips Corporation | System and method for adapting the transmission rate to the line quality and modem suitable for such a system |
WO1995008888A1 (en) * | 1993-09-24 | 1995-03-30 | Qualcomm Incorporated | Multirate serial viterbi decoder for code division multiple access system applications |
US5557639A (en) * | 1993-10-11 | 1996-09-17 | Nokia Mobile Phones Ltd. | Enhanced decoder for a radio telephone |
EP0648032A1 (en) * | 1993-10-11 | 1995-04-12 | Nokia Mobile Phones Ltd. | A signal quality detecting circuit and method for receivers in the GSM system |
EP0651531A3 (en) * | 1993-10-29 | 1998-01-28 | AT&T Corp. | Communication technique employing variable information transmission rate function of quality |
EP0651531A2 (en) * | 1993-10-29 | 1995-05-03 | AT&T Corp. | Communication technique employing variable information transmission rate function of quality |
US5963590A (en) * | 1993-11-29 | 1999-10-05 | Murata Mfg. Co., Ltd. | Method for receiving digital radio signals and a digital radio signals receiver |
US5956376A (en) * | 1993-11-29 | 1999-09-21 | Murata Mfg. Co., Ltd. | Apparatus for varying a sampling rate in a digital demodulator |
US5664095A (en) * | 1993-12-08 | 1997-09-02 | Intel Corporation | Dynamic scaling of CPU cycle consumption in a computer system |
US5790781A (en) * | 1993-12-08 | 1998-08-04 | Intel Corporation | Dynamic scaling of CPU cycle consumption in an I/O subsystem of a computer system |
US6108373A (en) * | 1993-12-15 | 2000-08-22 | Alcatel Telspace | Process and device for detecting loss of carrier recovery and of determining the Eb/No ratio of a digital transmission link |
EP0658993A1 (en) * | 1993-12-15 | 1995-06-21 | Alcatel Telspace | Method and apparatus for false-lock detection in carrier recovery and for SNR estimation (Eb/No) of a digital communication link |
FR2713855A1 (en) * | 1993-12-15 | 1995-06-16 | Alcatel Telspace | A method of detecting carrier recovery stall and determining the EB / NO ratio of a digital transmission link and device implementing this method. |
US6246335B1 (en) * | 1993-12-28 | 2001-06-12 | Nec Corporation | Portable information equipment system and control method thereof |
EP0702863A1 (en) * | 1994-02-17 | 1996-03-27 | Motorola, Inc. | Method and apparatus for controlling encoding rate in a communication system |
EP0702863A4 (en) * | 1994-02-17 | 1996-02-08 | Motorola Inc | Method and apparatus for controlling encoding rate in a communication system |
EP0715481A4 (en) * | 1994-06-20 | 2001-06-20 | Sony Corp | Communication system, base station, mobile station, and radio communication system |
EP0715481A1 (en) * | 1994-06-20 | 1996-06-05 | Sony Corporation | Communication system, base station, mobile station, and radio communication system |
US5608490A (en) * | 1994-06-20 | 1997-03-04 | Nikon Corporation | Apparatus for and a method of communicating between a camera and external equipment |
US5995515A (en) * | 1994-06-20 | 1999-11-30 | Sony Corporation | Communication system, base station, mobile station, and radio communication system |
US5619532A (en) * | 1994-09-05 | 1997-04-08 | Fujitsu Limited | Digital communication system |
US5726638A (en) * | 1994-12-12 | 1998-03-10 | Nippondenso Co., Ltd. | Method and device for serial communication |
US5546411A (en) * | 1995-02-28 | 1996-08-13 | Motorola, Inc. | Method and apparatus for adaptively selecting a communication strategy in a selective call radio communication system |
US5603088A (en) * | 1995-02-28 | 1997-02-11 | Motorola, Inc. | Method and apparatus for determining a quality level of an analog signal in a radio communication system |
WO1996027243A1 (en) * | 1995-02-28 | 1996-09-06 | Motorola Inc. | Method and apparatus for adaptively selecting a communication strategy in a selective call radio communication system |
EP0749092A2 (en) * | 1995-06-13 | 1996-12-18 | Ncr International Inc. | An electronic price label (EPL) system |
EP0749092A3 (en) * | 1995-06-13 | 2000-03-22 | Ncr International Inc. | An electronic price label (EPL) system |
US6252898B1 (en) * | 1995-07-19 | 2001-06-26 | Hitachi Denshi Kabushiki Kaisha | Spread spectrum communication method and system wherein data rate of data to be transmitted is changed in accordance with transmission quality |
US5978428A (en) * | 1995-08-23 | 1999-11-02 | Oki Electric Industry Co., Ltd. | Apparatus and method for estimating a variable data rate |
US5831545A (en) * | 1995-08-25 | 1998-11-03 | Motorola, Inc. | Method and apparatus for adjusting a communication strategy in a radio communication system using location |
GB2306866A (en) * | 1995-10-26 | 1997-05-07 | Bosch Gmbh Robert | Method of obtaining information about the residual errors in a transmitter channel-decoded digital signal |
GB2306866B (en) * | 1995-10-26 | 1998-08-05 | Bosch Gmbh Robert | Method of obtaining information about the residual errors in a transmitted channel-decoded digital signal |
US8170627B2 (en) * | 1996-08-20 | 2012-05-01 | Intermec Ip Corp. | Wireless communications system having reduced noise mode operation capability |
US20080212724A1 (en) * | 1996-08-20 | 2008-09-04 | Grabon Robert J | Wireless communications system having reduced noise mode operation capability |
US20040053578A1 (en) * | 1996-08-20 | 2004-03-18 | Grabon Robert J. | Wireless communications system having reduced noise mode operation capability |
US7327988B2 (en) * | 1996-08-20 | 2008-02-05 | Intermec Ip Corp. | Wireless communications system having reduced noise mode operation capability |
US5914959A (en) * | 1996-10-31 | 1999-06-22 | Glenayre Electronics, Inc. | Digital communications system having an automatically selectable transmission rate |
US5940439A (en) * | 1997-02-26 | 1999-08-17 | Motorola Inc. | Method and apparatus for adaptive rate communication system |
WO1998049800A1 (en) * | 1997-04-30 | 1998-11-05 | Telefonaktiebolaget Lm Ericsson | Estimation of radio channel bit error rate in a digital radio telecommunications network |
US6570911B1 (en) * | 1997-06-27 | 2003-05-27 | Intel Corporation | Method and apparatus for controlling modem data pump parameters based on processor loading |
US9124344B2 (en) | 1997-11-03 | 2015-09-01 | Qualcomm Incorporated | Pilot reference transmission for a wireless communication system |
US8077655B2 (en) | 1997-11-03 | 2011-12-13 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
US9118387B2 (en) | 1997-11-03 | 2015-08-25 | Qualcomm Incorporated | Pilot reference transmission for a wireless communication system |
US9001735B2 (en) | 1997-11-03 | 2015-04-07 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
US8351372B2 (en) | 1997-11-03 | 2013-01-08 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
US20070066320A1 (en) * | 1997-11-03 | 2007-03-22 | Roberto Padovani | Method and apparatus for high rate packet data transmission |
US8189540B2 (en) | 1997-11-03 | 2012-05-29 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
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JPH02162944A (en) | 1990-06-22 |
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